Inverse volume corrections from loop quantum gravity and the primordial tensor power spectrum in slow-roll inflation

Details Inverse volume corrections from loop quantum gravity and the primordial tensor power spectrum in slow-roll inflation Inverse volume corrections from loop quantum gravity and the primordial tensor power spectrum in slow-roll inflation

2009-02-20

arxiv.org/abs/0902.3605v2

Phys.Rev.D79:084015,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 5 figures, published version with minor modifications, results unchanged

Scientific paper

Together with holonomy corrections, inverse volume terms should be taken into account when studying the primordial universe in loop quantum cosmology. We investigate how the tensor power spectrum is modified with respect to the standard general relativistic prediction by those semiclassical corrections. Depending on the values of the free parameters of the model, it is shown that the spectrum can exhibit a very large deviation from its usual shape, in particular with a very red slope and a strong running in the infrared limit.

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